What is the level of organization of an onion bulb?
پاسخ دهید
(B)
organ
2
A characteristic exhibited by all living organism is?
پاسخ دهید
(D)
the ability to remove unwanted substances
3
In a cell, the genes are carried by?
پاسخ دهید
(B)
chromatin threads
4
Alternation of asexual and sexual modes of reproduction is found in?
پاسخ دهید
(C)
fern
5
The first terrestrial vertebrates evolved from
پاسخ دهید
(A)
pisces
6
In plants, the structures that play roles similar to the arteries and veins of animals are the
پاسخ دهید
(A)
xylem and phloem
7
A blue-green algae is not a protophyte because?
پاسخ دهید
(B)
its cells are prokaryotic
8
The feature that makes locomotion in water easy for fish is the?
پاسخ دهید
(C)
streamlined body
9
Bird toes suitable for digging have claws that are?
پاسخ دهید
(A)
blunt
10
Which of the following is an example of carnivorous plant?
پاسخ دهید
(B)
bladderwort
11
The part of alimentary system of a bird where food is ground into small particles is the?
پاسخ دهید
(D)
gizzard
12
which of the following describes the sequence of blood flow from the heart to a tissue?
پاسخ دهید
(A)
Heart→ artery→ arteriole →tissue?
13
The enzymes of the glycolytic pathway are located in the?
پاسخ دهید
(D)
cytoplasm
14
In insects, the structure that performs the same function as the kidney in man is the?
پاسخ دهید
(C)
malphigian tubule
15
The axial skeleton is found in the
پاسخ دهید
(A)
skull, ribs, vertebral column and breast bone
16
The reproductive system of a male mammal is made up of?
پاسخ دهید
(B)
testis, prostrate gland, sperm duct and penis
17
In a bean seed, absorption of water at the beginning of germination is through the?
پاسخ دهید
(B)
micropyle
18
The most important ecological factor in a terrestrial environment is?
پاسخ دهید
(D)
soil
19
The association between bacteria residing in the rumen of the ruminant is?
پاسخ دهید
(D)
mutualism
20
A marine protozoan is likely to have no contractile vacuole mainly because the cytoplasm is
پاسخ دهید
(A)
isotonic to sea water
21
In fresh water marshes and swamps, the most important abiotic factors that organisms have to adapt to is?
پاسخ دهید
(A)
nature of substratum
22
Which of the following biomass could be characterized by very low rainfall,cold nights, hot days, and fast blooming plants?
پاسخ دهید
(C)
tropical desert
23
Mass of crucible = 10g
Mass of crucible and soil before heating = 29g
Mass of a crucible and soil after heating = 18g
From the information above, determine the percentage of water in the given soil sample?
پاسخ دهید
(D)
60%
24
I. Onchocerciasis
II. Schistosomiasis
III.Salmonellosis
IV. Meningitis
which of the diseases listed above are associated with water?
پاسخ دهید
(C)
I, II and III
25
The major cause of global warming is the?
پاسخ دهید
(A)
burning of fossil fuel
26
The uniqueness of an individual organism in a population is accounted for by?
پاسخ دهید
(B)
variation
27
A phenotypic character with intermediate forms that can be graded from one extreme to the other is referred to as?
پاسخ دهید
(B)
continuous variation
28
A farmer's assumption that the seed from a good harvest will produce a good yield is explained by the theory of
پاسخ دهید
(D)
heredity
29
The nephridia in the earthworm form part of the?
پاسخ دهید
(D)
excretory system
30
A woman with the ability to roll her tongue (Tt) marries a man who cannot roll his tongue(tt). what is the probability of each of their children being a tongue roller?
پاسخ دهید
(C)
50%
31
A health condition that is known to have resulted from gene mutation is?
پاسخ دهید
(C)
sickle-cell anaemia
32
Plants that grow in an area that is neither too wet nor too dry are
پاسخ دهید
(B)
mesophytes
33
The part of a domestic fowl responsible for preventing heat loss is the?
پاسخ دهید
(C)
down feather
34
Which of the following animals is most adapted for water conservation?
پاسخ دهید
(D)
insects
35
The specialized pigment cells that are involved in colouration and colour change in animals?
پاسخ دهید
(B)
chromatophores
36
During the dry season in the tropics, the body metabolism of some animals slow to a minimal level in a process referred to as?
پاسخ دهید
(B)
aestivation
37
According to Darwin, the driving force behind evolutionary change is
پاسخ دهید
(A)
natural selection
38
Use the diagram above to answer this question.
The structure that controls loss of water vapour during transpiration is labelled
پاسخ دهید
(D)
lV
39
Use the diagram above to answer this question.
The part labelled l is the
پاسخ دهید
(C)
cuticle
40
Use the diagram above to answer this question.
Emulsification of fats takes place in the part labelled?
پاسخ دهید
(D)
lV
41
Use the diagram above to answer this question.
The content of the part labelled lll is usually?
پاسخ دهید
(C)
acidic
42
Use the diagram above to answer this question.
The zone of physiological stress is represented by?
پاسخ دهید
(D)
l and lll
43
Use the diagram above to answer this question.
The optimum temperature for the growth of the organism is
